everyone is right here. i am in the navy and you will be provided with all the diving equipment needed to complete your task. most of the time you are not allowed to use outside diving equipment, everything knowadays is usually by the pubs (manuals) and has to be navy certified for official use. if u start using your own equipment on ops and something happens your liable. so dont waste your money on useless stuff because most of the diving in the navy is salvage diving and underwater welding anyway which truthfully i dont even know if they use computers. most of those techie civilian computers ae for mixed gas, trimix, rebreather diving, etc. most of that stuff i dont know if it is even done in the navy but i could be wrong. there are some navy divers among the crowd here and you can ask them about their job. i am not a diver so i dont really know. but i have friends that are. a good rec computer would prob be along the lines of an aeris. cheap, affordable, and works under almost all conitions. i love mine. good luck in pensacola at dive school, and make sure your in top physical shape for the school. there will be very long days of running, swimming and calisthenics. stay motivated and best of luck to you.
p.s. it is not to late to tell your recruiter youve had a change of heart and would rather submit a package to come to coronado and go to BUD/S. blowing things up underwater is more fun than fixing things.